The B3D2300 is the BenchRocker — a premium variable-speed 3D nutating shaker in the Benchmark Scientific B3D family, sold at $1,149. Two key differentiators from the fixed-speed sister B3D1320 BioMixer ($602): variable speed control for protocol-flexibility across mixed workflows, and inclusion of both flat AND dimpled mats with the chassis (vs single-mat inclusion on the fixed-speed siblings). The combination supports multi-protocol shared-bench workflows where a single chassis serves both tube-mixing workflows (with dimpled mat) and tray / membrane workflows (with flat mat) under independently-tunable speed settings.
Author confidence note (MEDIUM): No specific B3D2300 brochure in available corpus. Specs sourced from universe label ("BenchRocker 3D Nutating Shaker with Variable speed; includes 12"×12" platform with 2 mats"). Confirm exact speed range, nutating angle, motor specifications, and mat-swap protocol with Benchmark Scientific technical support at first procurement.
Voltage options: This unit can be ordered with European voltage requirements (230V/50Hz). Contact us to order.
Key Specifications
| SKU | B3D2300 |
| Type | 3D Nutating Shaker with variable speed control |
| Platform dimensions | 12" × 12" (standard size) |
| Mats included | Both flat mat AND dimpled mat included with chassis |
| Speed control | Variable (vs fixed-speed B3D1320 BioMixer) |
| Motion type | 3D nutating |
| Voltage | 115 V or 230 V, 50–60 Hz (discrete variants) |
| Sister fixed-speed SKU | B3D1320 (BioMixer 3D Nutating Shaker, fixed speed, 12"×12" with single dimpled mat, $602) |
| Sister rocker chassis | B3D5000 (BenchWaver 3D Rocker, 13.5"×13" flat mat, $1,588 — premium-tier rocker) |
| List price | $1,149 |
Why Variable Speed — Protocol Flexibility
Fixed-speed rockers (B3D1308 / B3D1320, $602) deliver the manufacturer's pre-set speed — a single workflow setting that fits single-protocol routine workflows. Variable speed (this product) lets the operator tune speed to workflow requirements:
- Slow speed for delicate workflows — gentle membrane wash, sensitive cell-suspension mixing
- Standard speed for routine workflows — same setting as the fixed-speed siblings would deliver
- Faster speed for vigorous workflows — robust suspension mixing, faster wash cycles
Pick the variable-speed BenchRocker (B3D2300) when:
- Workflow includes multiple protocols requiring different speeds (delicate vs robust, slow vs fast)
- Method-development workflows — protocol-development comparing speed effects on workflow outcome
- Multi-investigator shared bench where investigators work different protocols with different speed needs
- Mixed-application bench — same chassis serves both tube-mixing (dimpled mat) and tray / membrane (flat mat) workflows
- The fixed-speed sister has been protocol-limiting (workflows requiring different speeds)
Stay with B3D1320 BioMixer (fixed speed, $602) when single-protocol routine workflows match the fixed-speed setting — $547 saving when variable speed isn't required.
Why Two Mats Included — Multi-Workflow Chassis
The B3D2300 ships with both the flat mat (for tray / membrane workflows) AND the dimpled mat (for tube workflows) — making it a dual-application chassis out of the box:
| Workflow | Mat | Application |
| Membrane / blot processing | Flat mat | Western blot wash, Southern / Northern blot, immunostaining trays |
| Tube content mixing | Dimpled mat | Cell staining, sample-prep tube mixing, suspension culture |
Single mat-swap converts the chassis between the two workflow modes — useful for bench-space-constrained labs (one chassis vs two chasses) and multi-protocol shared facilities (single instrument supports diverse workflows).
For dedicated single-workflow facilities, the fixed-speed siblings at $602 (with single appropriate mat) are the cost-efficient pick.
B3D Variable-Speed vs Fixed-Speed — Decision Matrix
| Feature | Fixed-speed (B3D1308 / B3D1320) | Variable-speed (B3D2300, this product) |
| Speed control | Pre-set, no adjustment | Variable — operator-tunable |
| Mats included | One (flat OR dimpled) | Both (flat AND dimpled) |
| Workflow flexibility | Single-protocol routine | Multi-protocol / method-development |
| List price | $602 | $1,149 (+$547 premium) |
| Best for | Single-application dedicated bench | Multi-application shared bench / method-development |
Application Profile
Multi-protocol shared bench workflows — facilities where the same chassis serves diverse tube + tray + membrane workflows.
Method-development workflows — protocol-development requiring speed-tuning across protocol variations.
Multi-investigator shared facility — investigators with different speed-preference protocols share the same chassis.
Cell-staining + Western blot mixed bench — facilities running both workflows on a single dual-mat chassis.
Educational laboratory teaching at scale — graduate / postdoc programs introducing multi-mat / multi-speed workflows.
Pharmaceutical / biotech research — high-flexibility workflow procurement where protocol-tuning matters.
Bench-space-constrained labs — single multi-application chassis vs two dedicated chasses.
Pilot-line method development — protocol-validation workflows requiring speed-tuning across pilot cycles.
Frequently Asked Questions
Does the B3D2300 have variable speed? Yes — operator-tunable variable speed, versus the fixed pre-set speed of the B3D1320 BioMixer.
Which mats are included? Both a flat mat (for tray / membrane workflows) and a dimpled mat (for tube workflows) ship with the chassis.
What is the platform size? 12 × 12 in.
How does it compare to the B3D1320 BioMixer? The B3D1320 ($602) is fixed-speed with a single dimpled mat; the B3D2300 adds variable speed and both mats for a $547 premium ($1,149).
What motion type does it use? 3D nutating motion.
Ordering & Configuration
Confirm variable-speed range. Confirm exact RPM range / speed-control granularity with Benchmark Scientific tech support at first procurement.
Plan mat-storage protocol. Two-mat inclusion requires storage protocol for the unused mat between workflow swaps — confirm storage planning at order.
Confirm voltage and plug type. 115 V / 230 V chassis; a 230 V EU-plug configuration is available by special order at the same $1,149.
Pair with workflow-specific accessories — tube-format mats / racks, tray inventory, membrane workflow accessories.
Confirm at quote: voltage and plug type, intended multi-protocol workflow context, variable-speed range fit, mat-storage protocol, and lead time.
Warranty: Per Benchmark Scientific standard capital-equipment terms — confirm at quote.
B3D family — variable-speed vs fixed-speed:
- B3D2300 (this product) — Variable-speed Nutating Shaker, 12"×12", 2 mats included ($1,149) — multi-protocol / method-development
- B3D1320 BioMixer — Fixed-speed Nutating Shaker, 12"×12", dimpled mat only ($602) — single-protocol routine
- B3D1308 BlotBoy — Fixed-speed Rocker, 12"×12", flat mat only ($602) — single-protocol routine
- B3D1020 / B3D1008 — Mini fixed-speed sisters at smaller platform ($484 / $497)
Pick the BenchRocker for multi-protocol / variable-speed workflows on a single chassis; sister fixed-speed chassis cover single-protocol routine workflows at lower cost.
